The sort of damage being mentioned sounds like a possible economic write-off to me if you are paying for new parts plus repair labour. Brake levers and hand grips are not generally expensive, nor are spokes. However forks can be, especially if the only option is genuine new and there is no generic compatible alternative available.
Then you've got the work involved, which in terms of the amount of dismantling and reassembly is quite a bit. Broken spokes in a rear wheel might need the freewheel to come off for access. The wheel will almost certainly need retrueing especially if it has taken a hit to cause the damage. So it might be new wheel time in the worst case if it won't true properly.
When you add it up, the cheapest option is likely to be to source an identical secondhand donor and use the best bits from both to make one good bike, an keep any useable leftover parts as future spares. Whenever I encounter dumped bikes with parts compatible with any bikes that I ride, I grab them even though I don't immediately need any more spares. If something gets damaged or naturally fails through wear & tear, my first port of call is always to rummage through my salvaged stuff.
